<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title th:text="#{error.page.title}">Error Page</title>
</head>
<body>
<!--<h1 th:text="#{error.page.header}">Custom Error Message</h1>-->
<!--<p th:text="#{error.page.message}">An error occurred while processing your request.</p>-->
<div class="error-page">
    <div>
        <h1 data-h1="404">404</h1>
        <p data-p="NOT FOUND">NOT FOUND</p>
    </div>
</div>
</body>

<style>
    .error-page {
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        height: 100%;
        font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
        margin-top: 20vh;
    }

    .error-page h1 {
        font-size: 30vh;
        font-weight: bold;
        position: relative;
        margin: -8vh 0 0;
        padding: 0;
    }

    .error-page h1:after {
        content: attr(data-h1);
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        color: transparent;
        /* webkit only for graceful degradation to IE */
        background: -webkit-repeating-linear-gradient(-45deg, #71b7e6, #69a6ce, #b98acc, #ee8176, #b98acc, #69a6ce, #9b59b6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-size: 400%;
        text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.25);
        animation: animateTextBackground 10s ease-in-out infinite;
    }

    .error-page h1 + p {
        color: #d6d6d6;
        font-size: 8vh;
        font-weight: bold;
        line-height: 10vh;
        max-width: 600px;
        position: relative;
    }

    .error-page h1 + p:after {
        content: attr(data-p);
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        color: transparent;
        text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.5);
        -webkit-background-clip: text;
    }

    #particles-js {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
    }

    @keyframes animateTextBackground {
        0% {
            background-position: 0 0;
        }
        25% {
            background-position: 100% 0;
        }
        50% {
            background-position: 100% 100%;
        }
        75% {
            background-position: 0 100%;
        }
        100% {
            background-position: 0 0;
        }
    }

    @media (max-width: 767px) {
        .error-page h1 {
            font-size: 32vw;
        }

        .error-page h1 + p {
            font-size: 8vw;
            line-height: 10vw;
            max-width: 70vw;
        }
    }

    a.back {
        position: fixed;
        right: 40px;
        bottom: 40px;
        background: -webkit-repeating-linear-gradient(-45deg, #71b7e6, #69a6ce, #b98acc, #ee8176);
        border-radius: 5px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        color: #fff;
        font-size: 16px;
        font-weight: bold;
        line-height: 24px;
        padding: 15px 30px;
        text-decoration: none;
        transition: 0.25s all ease-in-out;
    }

    a.back:hover {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }
</style>
</html>
